Authors: R Brian Haynes; Chris Cotoi; Jennifer Holland; Leslie Walters; Nancy Wilczynski; Dawn Jedraszewski; James McKinlay; Richard Parrish; K Ann McKibbon Journal: JAMA Date: 2006-04-19 Impact factor: 56.272
Authors: Sally Hopewell; Mike Clarke; David Moher; Elizabeth Wager; Philippa Middleton; Douglas G Altman; Kenneth F Schulz Journal: Lancet Date: 2008-01-26 Impact factor: 79.321